Strip applying device



R. H. HOLMWOO ETAL Oct. 2, l.1952

ASTRIP APPLYING DEVICE original-Filed Feb. 12, 1947 4 Sheets-Sheet 1Oct. 28, 1952 R. H. HOLMW ETAL 2,615,492 STRIP APPLYIN `DEVICE originalFiled Fel?. 12, 194?v 4 sheets-sheet 2 AG-ENT9J Oc't. 28, 1952 R.HoLMwob ET AL 2,615,492

STRIP APPIAYING DEVICE 4 Sheets-Sheet 3 Original Filed Feb. 12, 1947MXGQ'TW Patented Oct. 28, 1952 UNITED y STATES STRIP APPLYING DEVICERichard H. Holmwood, Binghamton, N. Y., and

Paul A. Hauck, Union, N. J., assignors to International BusinessMachines Corporation, New York, N. Y., a corporation of New YorkOriginal application February 12, 1947, Serial No. 728,050. Divided andthis application April 20, 1948, Serial No. 22,068

2 Claims. l

This invention relates to a device for applying strips of material tocover apertures in a web, and more particularly to a device for applyingstrips of stencil material to stencil cards produced in machines of thetype illustrated in a copending application, Serial No. 728,050, ledFebruary 12, 1947, now Patent No. 2,518,010, of which this applicationis a division.

An object of the invention is to provide a device for attaching portionsof stencil material to windows or apertures in a moving web.

Another object of the invention is to provide a stencil picker forremoving singly a stencil sheet from a stack of such sheets anddelivering it to an attaching mechanism.

lA still further object of this invention is to provide means forpreventing adhesive material from contaminating operating components ina strip applying device when the supply of strips becomes exhausted.

Other objects of the invention will be pointed out in the followingdescription and claims and illustrated in the accompanying drawings,which disclose, by way of example, the principle of the invention andthe best mode, which has been contemplated, of applying that principle.

In the drawings: l

Fig. 1 is a side elevation view of a stencil card producing machine intowhich the features of the present invention have bee'nvincorporated.

Fig. 2 is a sectional view' of the stencil material feeding mechanismshown under the reference number 66 of Fig. 1.

l Fig. 3 is a sectional view showing the mechanism, which preventscontamination of certain of the working parts by the adhesive.

Fig. 4 is a sectional View illustrating certainl components of thetissue feeding mechanism.

Fig. 5 is a detail view of the tissue picker andk the tissue supplymagazine.

Fig. 6 is a sectional View of the tissue picker along the line 5 6 ofFig. 5.

Fig. 7 is a detail view of thebottom of one of the two toes of thetissue picker, along the lines 'I-T of Fig. 5.

The overall layout of a stencil card machine in which the presentinvention is embodied is illustrated in Fig. 1.

A spindle 55 carries a roll of double width card stock 5I which is fedover an idler roll 52 to be engaged by a tensioning roller 53 and thenceover a guide roller 54 to a pair of feed rollers 55 and 56 in astockfeeding and inking mechanism 51. The strip of card stock is then fedover tension measuring rollers 58 and 59 and a platen 60 betissuefeeding mechanism 55.

mechanism 65 operates toapply sheets of stencil tissue to the strip ofcard stock which thereafter passes over a folding rod 67 Where thestripvis' folded longitudinally to form a two ply strip to pass betweenrollers in the closing and pressing mechanism B8. The strip is then fedby the last mentioned rollers under the press and out 01T die 69, whichsevers the strip into card lengths each containing a stencil tissueportion. The card l2, thus formed, is thereafter fed between the ejectorrolls I0- and II onto a table 'I3.

With further reference to Fig. 1, the prime mover for the machine is anelectric motor 'I4 which drives a pulley 'I5 attached to a shaftf. Adual speed drive assembly, provided with `the necessary gearing, isconnected to the shaft 'I6 by a clutch mechanism under control oi ahandle 'I'I to providevlow speed and high speedmachine operation. Thedrive mechanism will be described in detail later herein. Hoppers- 'I8are provided in the base of the machine toreceive the cuttings from thecard stock under action of the die 63. A necessary accessory to thesubject machine is a pump 19, capable of providing both suction andcompressed air, which is also located in the base of the machine. Areservoir 85 is located at one end of the machine for containingA liquidadhesive such as glue. A pump 3l is provided for pumping the adhesive tothe adhesive roller 56, located near one end of the machine.

Reference is made to Figs. 2, 3, 4,'and 5 relative to the tissue feedingmechanism 56. 'Sheets of stencil tissue are supplied from a stack in ahopper 2I0. A jet of air from a pipe 2| I is blown through an orifice2I2 to fan the edges' of the top sheets against a retaining catch 2 I3(see Fig. 5). A suction foot 2 I4, due to motion imparted to it, dipsinto contact with the top sheet withdrawing the sheet from under thecatch 2I3.

The foot 2M then rises and moves in the opposite direction (to the leftas viewed in Fig. 4)

drawing the sheet to a position above a hollowl thin. stencil sheets.

The slide 2H is carried by an arm 22| pivoted at 222 on a bracket 223and has a cam follower 224 supported upon it by a foot 225. The follower224 rides a cam 226, which raises the slide 2|?, or loWersit. The.motion of the foot 2 i4 thereby is made'up of the composite motions ofthe reciprocating carriage 2|6 and the raising and lowering of the slide2 l1.

The feed drum 215 is a semi-hollow roller provided with two activesectors 221 and two inactive sectors 228 (see Figs. 2 and 4:). Theactive sectors 221 have a series of holes) 229, the axes of which areparallel with radii of thedrurn 245. Striating channels 235 are provided'onthe periphery of theV drum 2 5 extending laterally from each hole229. A circular face valve'239 has an elongated arcuate port 23| (Fig.2) which is maintained at a pressure below atmospheric by a pipe 232leading to afvsuction pump 'I9 (see Fig. 1). The valve. 230 also has aport 233 (Fig. 2), which is maintained ata pressure above atmosv phericbya pipe 23:3 leading tothe highy pressure `side vof pump' 19. Theholes;229 indrum 215 (see 2) are arranged to'have channels, 235whichconnect with the ports23! and 233rso that, as "'the.drum"2|5. isrotated, 'eachhole 222V via its V:.channel`235 will communicate.witlrthe port 23| '.fromltheitime-it,passes' the top center line of the.'.drum`2 |5 untilit reaches the 'bottom center line ...ofthe `drumw2|5(seeFig. 4), and thereafter for a fraction v'ofthedrums cyclepf rotationeach ..1hole.229 via .its channel 235 will communicate .,withtheport.233.

Normally 'whenairpressure is. su'ddently ap- ;-.-plied,-.throughanopeningina member against a 2. 5, :the overhanging I.portion of thestencil Asheet K4:being seizedby the adhesive surface of the cardstools-upon coming into vcontact therewith.

r In the manner justfdescribeda 4sheet of :stencil V-Ltissue deliveredto the drum2|5-by the foot 2M ,'willfbe held to the periphery ofthefdrumby the '.suction from the holes 229 Yfor `a rpredeterminedtgperiodas the drum-is rotated, and then gradually forced'from theperipheryof .thefdrum by suc- .cessive'z blasts of air-fromthe holes229,-the stencil `r.sheet being-seized after .each blast by` theadhesive :coating onthe card stock, therebyeect-..i'ng-ajpeeling'of'thefsheet from the drum 2 i 5. The @valve-.239is-adjusted' byarod 236 'sott-hat a sheet yof stencil tissue is forcedfrom the` drum-as the sheet passes the 7bottom 'cen-ter line of .thedrum 2 |5'f(seel Eig.` 4) where vthe card stock-passesoverraecounterroller-.231, Athe adhesive lsurface of the cardstockfconta'cting'astencil tissue for the first -;tin1e` inthatilocation. The cardstock is fedbev-tweenthe drum 215,- andthe-roller 231-' so that a stencil tissue delivered from the :diurne-ZIEis superimposed upon an aperture in the card stock.

It is to'be noted that the striating channels `provided with the holes229 on the periphery of the drum Y2|5 are to prevent the deformation ofthe It is to be noted-further that suction is constantly applied to thefoot 2 |11 and that a stencil tissue is removed from the foot 2|4 bybeing seized between the drum 2 l5 and a feed roller 238 which togetherform a feeding couple (see Fig. 2), the stencil sheet passing under the5 `roller 233 ontothe periphery of the drum 2 I 5 and being -adheredtheretoby `suction from the holes 229.

The counterroller 231 is journalled on a rock- V-ing `frame 239 (seeFig. 3) which is supported on l0 a shaft'249, and is urged to rotateabout the shaft in a ciockwise Adirection by a spring 24|, therebyholding'the-roller 231 against the drum 2|5. A -canr 252 of similarcontour is mounted, coaxially, to "the'drum'25- Cam 242 coacts with aroller 15,'243 journalled'on'an arm 244 pivoted on the 1 frame '239.byastud 245. An interposer 246 piv- .otedon'anotherstud 241 on theframe 239 is provided With two notches 248 and 249 to coact with a pin250 on the arm 244. The interposer 245 is biased by a spring 25| so thatthe roller 243-wil1 be positioned toI cause therocking'frame '1239 to'be displaoedby Vthe cam`242'withdrawing the roller 231, and thestrip-ofAcardstock passing v-over'it, -from contactrwiththe'drum 245.

YThe exhaust-3252 lof anormally expanded-'bellows-253 isconnected'with"thefport'23|. AiBowden wire 254,attached'1to-'thediaphragm` Ofthe bellows, is fastened tothe'.'interposer246"by a clamp 2 55 vso that wheirthe. bellowsi'is`4expanded theV interposer is held withthe'notch"249"engag ing the pin25.(asshownin'fEigSL The bellows1253 willbe expanded 'by'atmosphericpressure when .there isno sheet of stencil tissue coveringthe holes 229, when the valve 239,.' is'iirnprop- Aerly adjusted, orwhen the vacuum .suction of pumpIS fails. `1`In any f these eventstheperipheral-surface` Yof the f drurn2l5 will not be contacted by theadhesive ,materialen the card stock since the roller"23,.whichsupportsfthe 40 card. stock under the drum, is cammed ,.away.Normal-lv,` however, when .the machine..isop eratingthere will...be Asuicient.suction' from the ,port 23| to.` hold-[the .bellows 253. in .a.collapsed state.` thereby tensioning .the Bowden wire.'254 to pull theinterposerf246..toengage '.the.not.chl248 with the pin 250whereby.the.,roller.."23'|..-is no longer .cammed away fromthe drum2125.

.The drive for vthe tissue. feeding. mechanism 66 is provided .bythechain |98 .(seejE'ig. .1) which' engages anddrives .thesprocket' 256(Fig. 2). The sprocket. 256. is. xedto. a..shaft251 which carries a gear258, thedrum 2|5, vandthe .cam 242. The spring 259 shownabout shaft 251is for the `purpose .of .holdingthe drum.2|5 .against the valve 23D, artype offace valve. The gear -258 `drives a gearlli()l whichis fixed to.ashaft 26| carryinga.gear.2l2, the cam 226,.the feed roll 238,- andacamf264 .(which operates the eccentric strap 229). The gear.262 drives.the hop- 0 per feed gearing via'idlers (not shownband a bevel gear 269whichfdrives anotherbevelgear 210 :attached -to a` lhopper feed shaft-21 I.

Detai-lsvof the suction foot-,2|4uareshownin Figs. 6 and '7. It is to benot-ed. that theviews zin tfFigs. 6 .and 7V represent .approximately oner half :of thefsuction foot,y therebeing twov such sections 2Mb persuction foot. .The bottom of -theffootismade concave asshowni-seealscFig.

g5 so that not more .than a. single .sheet .offstencil 70. .tissue .-ispicked each time .the .foot .engages v.the

stackfinthe `hopper 21.0, .Striationsi'2l2areprop `-,vided-inthebottomeof .eachsection of. the foot `.to :insu-re uniform gripping.ofthe .stenciLsheet and toprevent its becoming deformedduetothe actionof atmospheric pressure.

In order that the stack of sheets of stencil material is presentedproperly to the suction foot 2I4, as a result of the jet of air blownfrom the orifice 2I2, the top of the stack must be kept constantly at auniform distance from the catch 213 (Fig. 5). A hopper feed is providedas shown in Fig. 4. A platform 213 is provided and arranged to beelevated within the hopper 210 to lift the stack of sheets as they arewithdrawn by the foot 2I4. An extension of the platform 213 is attachedto a collar which rides on a threaded part 215 of the hopper feed shaft21|. The collar is provided with a toothed lug which is spring urgedagainst the threaded part 215 to advance the collar and its associatedplatform as the shaft rotates. A handle 211 serves to release the lug sothat the platform 213 may be lowered when a freshly lled hopper isplac'ed in the machine. y

While there have been shown and described and pointed out thefundamental novel features of the invention as applied to a preferredembodiment, it will be understood that various omissions andsubstitutions and changes in form and details of the device illustratedand in its operation may be made by those skilled in the art withoutdeparting from the spirit of the invention. It is the intention,therefore, to be limited only as indicated by the scope of the followingclaims.

What is claimed is: Y

1. In a machine of the class described wherein a web is fed betweenpairs of rollers, a pair of rollers, one of the rollers of said pairbeing provided with a series of air ports having peripheral openings,means for producing a suction in the said ports for causing a piece oftissue to adhere thereto at the said openings, a pivoted arm forsupporting the other roller of said pair, a spring normally biasing thesecond said roller against the first said roller to contact the webbetween them, means for displacing the second said roller against thebias of the said spring,

6 and means under control of the said openings for actuating the saidroller displacing means whereby the absence of a piece of tissueadhering to the rst said roller causes the second saidv roller to bedisplaced therefrom thereby breaking its contact with the said web.

2. In a machine of the class described wherein a web is fed betweenpairs of rollers, a pair of rollers, one of the rollers of said pairbeing provided with a series of air ports having peripheral openings,means for producing a suction in the said ports for causing a piece oftissue to adhere thereto at the said openings, a pivoted arm forsupporting the other roller of said pair, a spring normally biasing thesecond said roller against the rst said roller to contact the webbetween them, a cam on the iirst said roller for displacing the secondsaid roller therefrom, a bellows cooperating with the said suctionmeans, an interposer for disabling the said cam, and a Bowden wireconnecting the said interposer and the said bellows whereby acontraction of the latter due to the presence of a piece of tissuecovering the said openings retains the said interposer operative forseparating the said rollers and releasing the contact with the said web.

RICHARD H. HOLMWOOD. PAUL A. HAUCK.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 696,186 Orloff Mar. 25, 19021,304,943 Clark May 27, 1919 1,867,038 Upham July 12, 1932 2,189,673McNamee Feb. 6, 1940 2,202,496 Bombard May 28, 1940 2,206,043 NovickJuly 2, 1940 2,220,255 Marchev et al Nov. 5, 1940 2,384,231 BamfordSept. 4, 1945

